
I've found Apryse PDF SDK excellent for annotating piping and instrumentation diagrams. Its coordinate API is precise, so annotation positions sync accurately into our database at any zoom level. I also like the low-level control it gives me to build custom tools instead of relying on the default toolbar. Review collected by and hosted on G2.com.
I hit a rendering limit where very large, dense engineering drawing diagrams can silently render as a blank canvas past a certain zoom and size. Review collected by and hosted on G2.com.


